Collar-clamp.



'0. E. RADTVKE. n COLLAR CLAMP;y l APPLICATION FIL'EDJUNE 9. 1915.

' Patent-6d May16,.1916. L

gnomo/ lso OTTO E. RADTKE, OF AURORA, NEVADA.

COLLAR-CLAMP.

Application led June 9, 1915.

To all whom t may concern Be it known that I, OTTO E. RADTKE, a citizenof the United States, residing at Aurora, in the county of Mineral andState of Nevada, have invented certain new and use'- ful Improvements inCollar-Clamps, which the following is a specification.

The purpose of this invention has been to devise a simple, effective,and easily op-A erable supporting collar clamp for drilling machines.

In its preferred embodiment the clamp hereinafter more Afully describedin detail is comprised of sections adapted to embrace or receive thecolumn of the mining drill, suitable fastening means being employed atthe opposite ends of said sections, whereby to effectively hold theclamp at a predetermined adjustment longitudinally of the drill column.The fastening means include gib and key devices so mounted upon thesections of the clamping collar that the latter may be quickly loosenedand rigidly positioned b`y clamping action in respect to said column.

An especial object in view in the detail construction of the inventionhas been to so assemble and construct the fastening devices thataccidental liability of displacement of the latter is entirely obviated.

With the above and other objects in view,

' this invention consists in the construction,

combination and arrangement of parts all as hereinafter fully described,claimed and illustrated in the accompanying drawing, wherein:

Figure 1 is a perspective view of a sup porting clamping collarembodying the essential features of the invention. Fig. 2 is a sideelevation.

Throughout the following detail description, and on the several figuresof the drawing, similar parts are referred to by like referencecharacters.

Referring to the drawing, and specifically describing the constructionillustrated, A denotes the body of the clamping collar, the sameconsisting of opposing similarly formed sections 1 and 2. Sections 1 and2 are provided at one end with short oifstanding apertured lugs 3through which passes a bolt or similar fastening 5 located at one sideof the device. At the opposite side of the body A of the device, thesections 1 and 2 are formed with relatively long o'standng arms 5 and 6,The arms 5 Specification of Letters Patent.

Patented May 1e, 191e. serial 110.133,08?.

-with corresponding slots, the outer portions of rwhich receive the gib7 and key 8,' the innermost portions of which receive thef head portion9 of a slidable clamping dog 9.-

The dog 9 might be said to be of T-shaped formation, the head of the dogbeing received in'the slots of the arms 5 and 6 as above described, andthe central portion'of the dog being disposedinterlnediatethe sectionsland 2 of the innermost surface curved to conform with thecircumferential curvature of the drill column and to, vof course, alsoconform with the curvature ofthe inner walls of the' sections Aland2which are designed to snugly embrace said colur'mi.'v At its oppositeends, the gib 7 `has an outwardly projecting eX- tension 7 and in likemanner at its opposite ends the key 8 has inwardly projecting extension9, both the key and the gib being of tapered formation to obtain theusual wedging coperation obtained in devices of this sort as commonlyemployed in the art.

Owing to the provision of the projections and 9 on the gib7 and key 8respectively and the disposition of the dog 9 such that the head portionis received by the slots of the arms 5 and 6, it will be evident thatthe accidental displacement vof the members 7 and 8 as well as themember 9 is prevented it being impracticable to remove these membersfrom the clamping collar while the parts are connected together in themanner shown in the drawings.

and 6 are provided the klongitudinal displacement of the key 8.`

The construction of the clamping collar. as above set forth, is suchthat the actionv of the device is very simple, the operator only beingrequired to strike the key 8 a light blow in either direction to loosenthe collar on the drill column or effectively tighten the same in rigidengagement with said column device and having itsy Any tendency for `thekey 8 to be displaced longitudinally is that the fastening 4 mustthrough the frictional engagementv of the' parts l and 2 and 9. There isno liability Whatever of the clampingffcollar*becomingaccidentallydetached from the column for the reasons hereinbefore presented.

Having thus describedmy invention, What" yclaim as new is: y

l. A clamping. collar for;k minef drilling;

machines comprising opposing sections formed at .Y one ende-:Withozffstandng lugs-,1 and lati-the g-opposite f-endsfwitholi'standing;lugs,` 130:1 v gether, ,the x:arms being, formed` with;r slots thereof,a gibandfikeyjyextendng;

armsaa; fasteningf; oonneeti-'n-gi; said lengthwise through the .slotsoffsaidfarms;v and oppositely taperedy fory Wedging coperatinng the i fgib. beingprovidedW-ith offstanding'zfproj eotions 'to engage with.thesaid arms toiprevent ,disp placement i ot the gib, and fa fclampng;folug; disposed. intermediate said 4iarmsandi o'rrnedf Withfaportoncoincdenti Nvith'fthe inner; sure; faces of fthe* lamp; seetions,saidldogfalse, bef' head ,proj eetingi ,Kandi rope eratlngin .thef Slots,-offtheoi'fstanding; arms i d ing; lformed` Witha otxsaid. sections., rv Y 22,1 A@ clamping! col-lar forl 1min'elfdrill.Y -Coll Copiesfofthis:patent may,bembtaned.fo-r.1 rvelcents each, byaddressinggtheCommiss-ioner,gofiPtentln.

against the' nther, the :giblhaying projections at` its fendsengageablle with( theA outer sides ofi-the armsfto` preventdisplaeement,of `the gib, a,- clampingg dog arranged betweenf saidV arms andhavingfits; inner -f-en'd coincidentwithy the inner surfacey of# the:sections-,and provided at its. outer enidzwith a jheadoperatfingA'in-the slots :of isaidi arms, gandengageable by the said key, thekey being formedrwith thezprojeetionsfarranged at iitsends and ,op-

posite -to theV head-lof the' said. Idogiandicofv operative therewithtoprevent unauthorized.

ispl'acement of lthe key.' .Y

OTTO RADTK'E;

Inftestimony ',WhereoffT ai-vxmywsignatllne;

